Kannancr .. i think it is okay ...
My belief is , the stamp is same as having a card. Also with the 180 days rule, there should not be any problem, as long as you are working ..in this country and paying taxes in the similar professional field, not being a burden to the government. As for the sponsoring employer doing any thing , i think you are safe since you satisfied the 180 days and even more. It’s all how long we can remain scared in this country and get exploited, go through both emotional and financial pain just to get this , I think we have to take bold step at some point..
Make a good decision..